Cita APA (7th ed.)

Gurr, J. E. (1959). The principle of sufficient reason in some scholastic systems 1750-1900. The Marquette University.

Cita Chicago (17th ed.)

Gurr, John Edwin. The Principle of Sufficient Reason in Some Scholastic Systems 1750-1900. Milwaukee: The Marquette University, 1959.

Cita MLA (9th ed.)

Gurr, John Edwin. The Principle of Sufficient Reason in Some Scholastic Systems 1750-1900. The Marquette University, 1959.